package com.proton.carepatchtemp.login.activity;

import android.content.Intent;
import android.os.Bundle;
import android.support.v4.view.ViewPager;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.view.ViewGroup;
import android.view.Window;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.TextView;

import com.proton.carepatchtemp.R;
import com.proton.carepatchtemp.activity.LoginInternationalActivity;
import com.proton.carepatchtemp.adapter.GuidePageAdapter;
import com.proton.carepatchtemp.application.VCare;

import java.util.ArrayList;
import java.util.List;

public class FirstStartActivity extends AppCompatActivity implements ViewPager.OnPageChangeListener {

    private ViewPager vp;
    private int[] imageIdArray;//图片资源的数组
    private List<View> viewList;//图片资源的集合
    private ViewGroup vg;//放置圆点
    //实例化原点View
    private ImageView iv_point;
    private ImageView[] ivPointArray;
    //最后一页的按钮
    private TextView ib_start;
    private TextView tv_text;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        supportRequestWindowFeature(Window.FEATURE_NO_TITLE);
        setContentView(R.layout.activity_first_start);

        tv_text = findViewById(R.id.tv_text);
        tv_text.setText(R.string.string_24_hours_monitor);
        ib_start = findViewById(R.id.guide_ib_start);
        ib_start.setOnClickListener(v -> {
            if (VCare.isInternal) {
                startActivity(new Intent(FirstStartActivity.this, LoginInternationalActivity.class));
            } else {
                startActivity(new Intent(FirstStartActivity.this, LoginFirstActivity.class));
            }
            finish();
        });
        //加载ViewPager
        initViewPager();

        //加载底部圆点
        initPoint();
    }

    /**
     * 加载底部圆点
     */
    private void initPoint() {
        //这里实例化LinearLayout
        vg = findViewById(R.id.guide_ll_point);
        //根据ViewPager的item数量实例化数组
        ivPointArray = new ImageView[viewList.size()];
        //循环新建底部圆点ImageView，将生成的ImageView保存到数组中
        int size = viewList.size();
        for (int i = 0; i < size; i++) {
            iv_point = new ImageView(this);
            iv_point.setLayoutParams(new ViewGroup.LayoutParams(20, 20));
            iv_point.setPadding(30, 0, 30, 0);//left,top,right,bottom
            ivPointArray[i] = iv_point;
            //第一个页面需要设置为选中状态，这里采用两张不同的图片
            //将数组中的ImageView加入到ViewGroup
            vg.addView(ivPointArray[i]);
        }
    }

    /**
     * 加载图片ViewPager
     */
    private void initViewPager() {
        vp = findViewById(R.id.guide_vp);
        //实例化图片资源
        imageIdArray = new int[]{R.mipmap.guide_first, R.mipmap.guide_second, R.mipmap.guide_third, R.mipmap.guide_fourth};
        viewList = new ArrayList<>();
        //获取一个Layout参数，设置为全屏
        LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(
                LinearLayout.LayoutParams.MATCH_PARENT, LinearLayout.LayoutParams.MATCH_PARENT);
        //循环创建View并加入到集合中
        int len = imageIdArray.length;
        for (int i = 0; i < len; i++) {
            //new ImageView并设置全屏和图片资源
            ImageView imageView = new ImageView(this);
            imageView.setLayoutParams(params);
            imageView.setBackgroundResource(imageIdArray[i]);
            //将ImageView加入到集合中
            viewList.add(imageView);
        }
        //View集合初始化好后，设置Adapter
        vp.setAdapter(new GuidePageAdapter(viewList));
        //设置滑动监听
        vp.addOnPageChangeListener(this);
    }

    @Override
    public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
        switch (position) {
            case 0:
                tv_text.setText(R.string.string_24_hours_monitor);
                break;
            case 1:
                tv_text.setText(R.string.string_baby_own_profile);
                break;
            case 2:
                tv_text.setText(R.string.string_high_temp_warm);
                break;
            case 3:
                tv_text.setText(R.string.string_remote_share);
                break;
            default:
                break;
        }
    }

    /**
     * 滑动后的监听
     */
    @Override
    public void onPageSelected(int position) {
        //判断是否是最后一页，若是则显示按钮
        if (position == imageIdArray.length - 1) {
            ib_start.setVisibility(View.VISIBLE);
        } else {
            ib_start.setVisibility(View.GONE);
        }
    }

    @Override
    public void onPageScrollStateChanged(int state) {

    }
}

